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Last seen: Jun 26, 2026
Hi @harleecooper, you'll get some help here. But it may be well worth getting in an expert in renewable heating to look at the system set up and commi...
Refrigerant efficiency is quoted in absolute terms with reference to the refrigerant properties. There are many more variables that determine the over...
Welcome @biagg from a fellow Grant 10kW Aerona owner. The key with the Aerona is to have all radiators and thermostats constantly calling for heat a...
Great news @crimson on the primary flow. Get well soon in what hopefully is a warmer house. I need to research that LLH to see what internals could im...
All pipework on CH and DHW side in plant room that can get warm, flow and return, even expansion vessel connections, should be insulated. heat lost an...
Thanks @crimson, buried primary piping looks a proper product, probably Isoflow or similar. Good. Primary flow must be fixed #1 priority. Clean stra...
@crimson good morning. Lots of people here want this one fixed for you! What's the approximate length of buried pipework on the primary circuit under ...
Hi @crimson, sure. The formula is the sensible heat equation, to work out how much heat energy in kJ/s is being added. 9 is your flow rate as indica...
@crimson great stuff. The delta T between flow and return is high, especially when your ASHP is on low load, 1300W power consumption, that's about 1/3...
@Crimson, I hesitate to state it, but it seems like your plumbers are clueless. You need a fresh pair of eyes on the job as there's something seriousl...
Finally Grant is waking up and smelling the coffee and, when they offer their 'smart controller' option pack (which monitors primary flow rate), they ...
Hi @crimson, probably time to bite the bullet and get the system checked over by Grant. The installation manual from Grant has suggested circuits for ...
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RE: Plug and play solar. Thoughts?
My thought is simple. Bring it on and bring on plug in...
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RE: Heat Geek mini store vs pump size
Yes I agree, that’s why Heat Geek have most likely sele...
By Tomtheheatingengineer , 1 day ago
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RE: Who's your electricity provider and what's your tariff?
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@tomtheheatingengineer, thank you, and welcome to the f...
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
There is scope for product development here. I for one...
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RE: Is the "divide by 2900" rule still valid?
Really flow rate is a pipework limitation not a water p...
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RE: The good, the bad and the not that great – my heat pump installation
@burtis, I’ve followed this thread pretty much from the...
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RE: Starting Our Heat Pump Journey: 1962 build 3 bed detached house
First time poster here but I can share my experience as...
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RE: Is it the house or the equipment?
...which, I've found out, is pretty much impossible to ...
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